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I'm having problems with my WiFi on a Lenovo G50-70. After a certain time WiFi drops the network. then I have to go for rebooting the whole system to get it back again. please suggest me how to fix it.

when I tried to know the hardware version it shows as below:

sudo lshw | grep [Ww]ireless
     description: Wireless interface
     product: RTL8723BE PCIe Wireless Network Adapter
     capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
     configuration: broadcast=yes driver=rtl8723be driverversion=3.13.0-45-generic firmware=N/A ip=192.168.1.5 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn

Thanks

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  • I had the same problem and I followed the instructions of user241073. Actually things became better: now when connection is lost I can "simply" reconnect from network manager. However, it is not so good. Have Anyone a definitive solution? Thanks
    – user427267
    Jul 7, 2015 at 13:28

3 Answers 3

Reset to default
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sudo apt-get install linux-headers-generic build-essential
wget -N -t 5 -T 10 https://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.18.1/backports-3.18.1-1.tar.xz
tar -xf backports-3.18.1-1.tar.xz
cd ~/backports-3.18.1-1
make defconfig-rtlwifi
make
sudo make install

Reboot and enjoy as it should work in 14.04 just like it did in 12.04

Ask Ubuntu 12.04 z50-70

Be sure to read my comment about what to do when your kernel updates...you will know when it happens as your wifi should give you problems again

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  • can i know the actual root cause for this?
    – harish
    Feb 10, 2015 at 16:29
  • I don't know the exact cause of the drop or what was the fix, here is a link to the changelog git.kernel.org/cgit/linux/kernel/git/bluetooth/…
    – Jeremy31
    Feb 10, 2015 at 17:02
  • i followed the above steps and installed all the modules. then after reboot it was not even connecting to any of the available network. so i had to revert back :(
    – harish
    Feb 11, 2015 at 18:28
  • I wonder if chili's answer here still works askubuntu.com/questions/389268/… I know it is kept up to date
    – Jeremy31
    Feb 11, 2015 at 19:11
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I had been struggling with this issue for months. Here's what finally worked for me and seems to be working for others on 14.04:

Download the latest driver (you might have to install git first)

git clone http://github.com/lwfinger/rtlwifi_new.git

Change into the new directory you just created

cd rtlwifi_new

Compile and install the new driver

make
sudo make install

Edit the settings for the driver

echo "options rtl8723be fwlps=0 swlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf

It's probably a good idea to take a look at that file to make sure that worked. Some people say the "swlps=0" part of the command above is unnecessary. I'm not sure but it doesn't seem to be hurting anything.

Reboot.

The next time your system updates the kernel, you may have to do this part again:

cd rtlwifi_new
make
sudo make install

I'd be curious to hear if others have tried this on releases other than 14.04 with success.

Good luck!

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The only way that worked for me, was detailed in the bug report at:

https://bugs.launchpad.net/ubuntu/+s...x/+bug/1320070

at the end there is a link to a script which disables your bluetooth (and maybe other things)..... This fixed the problem for me ... But obviously stopped bluetooth working.

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